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Racket vs Steel Bank Common Lisp: catalog facts
Racket	Steel Bank Common Lisp
Free Free and open source, supported by donations.	Free Free and open source under a permissive licence.
Windows, macOS, Linux, Command line	Windows, macOS, Linux, Command line
Macros that let you build your own languages Cross-platform GUI framework included	Compiles Common Lisp to fast native code Built-in debugger, profiler and coverage tool
Smaller ecosystem than mainstream languages Lisp-style syntax takes adjustment for newcomers	Command-line environment; editor integration comes from tools such as Emacs and SLIME Platform support varies, so check the download page
Downloadable app	Downloadable app
Open source	Open source
License: Apache-2.0 OR MIT	License: Public domain, MIT and BSD-style
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.